Cloth compression using local cylindrical coordinates

摘要

Dense triangular mesh is required to represent fine wrinkle details, which leads to heavy cost of storage and network transmission payload for cloth animation. This paper describes a simple and efficient compression method based on the nearly inextensible property of cloth, whose main degrees of freedom are the dihedral angles. Given a single frame as the reference, we build a local cylindrical coordinate system and encode the vertex as three channels: dihedral angle, change of radius and height w.r.t. the reference. The values of latter two channels are close to zero due to the inextensibility of cloth, which helps for a high compression ratio. Compared with previous approaches, our method can achieve a higher compression ratio with lower computational cost.